.page-faq {
  --faq-rule: rgba(74, 79, 85, .26);
  --faq-rule-dark: rgba(201, 206, 212, .22);
  background: var(--paper);
}

/* ---------- 开场 ---------- */

.page-faq .panel--lead.faq-hero {
  position: relative;
  overflow: hidden;
  padding-top: calc(var(--header-h) + clamp(28px, 5vw, 60px));
  padding-bottom: clamp(40px, 6vw, 76px);
  background:
    radial-gradient(120% 92% at 88% 6%, rgba(216, 35, 42, .28), transparent 60%),
    radial-gradient(90% 70% at 6% 96%, rgba(196, 98, 60, .18), transparent 58%),
    linear-gradient(166deg, #14365a 0%, var(--sea) 44%, var(--sea-ink) 100%);
  color: var(--cream);
}

.page-faq .faq-hero-grid {
  display: grid;
  gap: clamp(26px, 4vw, 46px);
  align-items: end;
  margin-top: clamp(22px, 3.4vw, 38px);
}

.page-faq .faq-hero-copy .eyebrow {
  color: var(--lime);
  margin-bottom: 14px;
}

.page-faq .faq-hero-copy .display-1 {
  color: var(--cream);
  margin: 0 0 clamp(16px, 2.4vw, 24px);
  text-wrap: balance;
}

.page-faq .faq-hero-copy .lede {
  color: rgba(245, 241, 232, .84);
  max-width: 62ch;
  margin: 0;
}

.page-faq .faq-hero-visual {
  position: relative;
  overflow: hidden;
  border-radius: var(--r-panel);
  border: 1px solid var(--faq-rule-dark);
  clip-path: polygon(8% 0, 100% 0, 100% 100%, 0 100%);
}

.page-faq .faq-hero-visual img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  opacity: .46;
  filter: saturate(.72) contrast(1.06);
}

.page-faq .faq-hero-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(11, 17, 22, .86) 0%, rgba(14, 42, 71, .28) 56%, rgba(216, 35, 42, .34) 100%);
  pointer-events: none;
}

.page-faq .faq-tools {
  display: grid;
  gap: 18px;
  margin-top: clamp(30px, 4.6vw, 54px);
  padding-top: clamp(22px, 3vw, 34px);
  border-top: 1px solid var(--faq-rule-dark);
}

.page-faq .faq-search {
  position: relative;
  max-width: 580px;
}

.page-faq .faq-search-icon {
  position: absolute;
  left: 19px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--silver);
  pointer-events: none;
}

.page-faq .faq-search-input {
  width: 100%;
  padding: 15px 22px 15px 50px;
  border-radius: var(--r-pill);
  border: 1px solid rgba(201, 206, 212, .34);
  background: rgba(11, 17, 22, .44);
  color: var(--cream);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.5;
  -webkit-appearance: none;
  appearance: none;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-search-input::placeholder {
  color: rgba(201, 206, 212, .6);
}

.page-faq .faq-search-input:hover {
  border-color: rgba(201, 206, 212, .52);
}

.page-faq .faq-search-input:focus-visible {
  outline: 2px solid var(--red);
  outline-offset: 3px;
  border-color: var(--red);
}

.page-faq .faq-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero .chip {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 9px 16px;
  border-radius: var(--r-pill);
  border: 1px solid rgba(201, 206, 212, .3);
  background: rgba(245, 241, 232, .06);
  color: var(--cream);
  font-size: 14px;
  line-height: 1.4;
  text-decoration: none;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-faq .faq-hero .chip:hover {
  background: rgba(216, 35, 42, .26);
  border-color: var(--red);
  transform: translateY(-2px);
}

.page-faq .faq-hero .chip:focus-visible {
  outline: 2px solid var(--red);
  outline-offset: 3px;
}

.page-faq .faq-count {
  display: inline-block;
  padding: 1px 8px;
  border-radius: var(--r-pill);
  background: rgba(245, 241, 232, .14);
  color: var(--cream);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.5;
}

/* ---------- 分组 ---------- */

.page-faq .faq-group {
  padding-block: clamp(46px, 7vw, 86px);
}

.page-faq .faq-group:first-of-type {
  padding-top: clamp(40px, 6vw, 72px);
}

.page-faq .faq-group + .faq-group {
  border-top: 1px solid var(--faq-rule);
}

.page-faq .faq-group-head {
  align-items: baseline;
}

.page-faq .faq-group-note {
  position: relative;
  margin: 0 0 clamp(20px, 3vw, 32px);
  padding-left: 15px;
  max-width: 68ch;
  font-size: 14px;
  line-height: 1.72;
  color: var(--stone);
}

.page-faq .faq-group-note::before {
  content: "";
  position: absolute;
  left: 0;
  top: .34em;
  width: 3px;
  height: 1.15em;
  border-radius: 2px;
  background: var(--clay);
}

.page-faq .faq-group-intro {
  display: grid;
  gap: clamp(20px, 3vw, 36px);
  align-items: start;
  margin-bottom: clamp(22px, 3vw, 34px);
}

.page-faq .faq-group-intro .faq-group-note {
  margin-bottom: 0;
}

.page-faq .faq-group-figure {
  margin: 0;
}

.page-faq .faq-group-figure .media-caption {
  color: var(--stone);
}

/* ---------- 问答条目 ---------- */

.page-faq .faq-list {
  border-top: 1px solid var(--faq-rule);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .faq-item > summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  padding: clamp(16px, 2.2vw, 22px) 0;
  cursor: pointer;
  list-style: none;
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-item > summary::-webkit-details-marker {
  display: none;
}

.page-faq .faq-item > summary::marker {
  content: "";
}

.page-faq .faq-item > summary:hover .faq-q {
  color: var(--red-dark);
}

.page-faq .faq-item > summary:focus-visible {
  outline: 2px solid var(--red);
  outline-offset: 4px;
  border-radius: 6px;
}

.page-faq .faq-q {
  font-family: var(--font-display);
  font-size: clamp(16px, 1.5vw, 18px);
  font-weight: 800;
  line-height: 1.5;
  color: var(--ink);
  letter-spacing: .005em;
}

.page-faq .faq-item[open] .faq-q {
  color: var(--red-dark);
}

.page-faq .faq-arrow {
  flex: 0 0 auto;
  width: 10px;
  height: 10px;
  margin-top: .55em;
  border-right: 2px solid var(--stone);
  border-bottom: 2px solid var(--stone);
  transform: rotate(-45deg);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-item[open] .faq-arrow {
  transform: rotate(45deg);
  border-color: var(--red);
}

.page-faq .faq-a {
  max-width: 76ch;
  padding-bottom: clamp(18px, 2.4vw, 26px);
}

.page-faq .faq-item[open] .faq-a {
  animation: faq-open var(--dur) var(--ease);
}

@keyframes faq-open {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: none; }
}

.page-faq .faq-a p {
  margin: 0 0 12px;
  font-size: 16px;
  line-height: 1.78;
  color: var(--ink-soft);
}

.page-faq .faq-a p:last-child {
  margin-bottom: 0;
}

.page-faq .faq-group-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 22px;
  margin-top: clamp(24px, 3.4vw, 36px);
}

.page-faq .faq-foot-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--stone);
}

/* ---------- 术语表 ---------- */

.page-faq .faq-glossary.panel--moss {
  background: var(--paper-moss);
  padding-block: clamp(46px, 7vw, 84px);
}

.page-faq .glossary-list {
  display: grid;
  gap: 0;
  margin: 0;
  border-top: 1px solid var(--faq-rule);
}

.page-faq .glossary-row {
  display: grid;
  gap: 4px;
  padding: 16px 0;
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .glossary-row dt {
  font-family: var(--font-editorial);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--sea);
}

.page-faq .glossary-row dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--ink-soft);
}

/* ---------- 收尾 ---------- */

.page-faq .faq-unresolved {
  padding-block: clamp(48px, 7vw, 88px);
  background:
    radial-gradient(110% 90% at 92% 4%, rgba(216, 35, 42, .26), transparent 58%),
    linear-gradient(152deg, var(--sea) 0%, var(--sea-ink) 100%);
  color: var(--cream);
}

.page-faq .faq-unresolved .eyebrow {
  color: var(--lime);
  margin-bottom: 12px;
}

.page-faq .faq-unresolved .display-3 {
  color: var(--cream);
  margin: 0 0 clamp(16px, 2.4vw, 22px);
}

.page-faq .faq-unresolved-grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  align-items: start;
}

.page-faq .faq-unresolved-text {
  max-width: 64ch;
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.78;
  color: rgba(245, 241, 232, .82);
}

.page-faq .faq-unresolved-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(18px, 2.6vw, 28px);
}

.page-faq .faq-contact-card {
  padding: clamp(20px, 3vw, 30px);
  border: 1px solid var(--faq-rule-dark);
  border-radius: var(--r-panel);
  background: rgba(11, 17, 22, .44);
}

.page-faq .faq-contact-title {
  margin: 0 0 16px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--faq-rule-dark);
  font-family: var(--font-editorial);
  font-size: 17px;
  font-weight: 600;
  color: var(--cream);
}

.page-faq .faq-contact-item {
  display: grid;
  gap: 4px;
  padding: 13px 0;
  border-bottom: 1px dashed var(--faq-rule-dark);
}

.page-faq .faq-contact-item:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-faq .faq-contact-label {
  font-size: 12px;
  letter-spacing: .08em;
  color: rgba(201, 206, 212, .72);
}

.page-faq .faq-contact-value {
  font-size: 15px;
  line-height: 1.6;
  color: var(--cream);
  word-break: break-word;
}

.page-faq .faq-contact-value--mono {
  font-family: var(--font-mono);
  letter-spacing: .02em;
}

/* ---------- 响应式 ---------- */

@media (min-width: 600px) {
  .page-faq .glossary-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(24px, 4vw, 54px);
  }

  .page-faq .glossary-row {
    grid-template-columns: minmax(88px, 132px) minmax(0, 1fr);
    gap: 14px;
    align-items: baseline;
  }
}

@media (min-width: 860px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-faq .faq-group-intro {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
  }

  .page-faq .faq-unresolved-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 400px);
  }
}

@media (min-width: 1080px) {
  .page-faq .faq-group-intro {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: clamp(32px, 4vw, 56px);
  }

  .page-faq .faq-hero-grid {
    gap: clamp(32px, 4vw, 56px);
  }
}

@media (max-width: 699px) {
  .page-faq .faq-hero-visual {
    clip-path: none;
  }

  .page-faq .faq-hero-visual img {
    aspect-ratio: 5 / 3;
  }

  .page-faq .faq-group-foot {
    flex-direction: column;
    align-items: flex-start;
  }

  .page-faq .faq-unresolved-actions .btn {
    width: 100%;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item[open] .faq-a {
    animation: none;
  }

  .page-faq .faq-arrow,
  .page-faq .faq-hero .chip,
  .page-faq .faq-search-input {
    transition: none;
  }

  .page-faq .faq-hero .chip:hover {
    transform: none;
  }
}